An error occurred while saving the commentMatt Patenaude commented
You can already do this, but what you can't do is join the same call or 'meet now' from two devices, which forces you to create a meeting so you can talk on one device and share the screen on another.
This happens a lot since for me work I remote into a workstation at the office, which can't push audio from my home computer.
The team is looking into this feature and considering solutions. We will update when there is more information to share.